An industrial engineer would like to determine whether there are more units prod
ID: 3151269 • Letter: A
Question
An industrial engineer would like to determine whether there are more units produced on the afternoon shift than on the morning shift. A sample of 50 morning-shift workers showed that the mean number of units produced was 345, with a standard deviation of 21. A sample of 60 afternoon-shift workers showed the mean number of units produced was 351, with a standard deviation of 28 units. At the .05 significance level we will test if the mean number of units produced on the afternoon-shift is larger. Is this a one sample test or a two sample test?
one sample test
two sample test
neither
both
What is test statistics? & Critical value?
one sample test
two sample test
neither
both
What is test statistics? & Critical value?
Explanation / Answer
This is an example of two sample t test.
Both the samples come from two independent populations- one sample comes from morning-shift workers and the other samples come from afternoon-shift workers.